JPH03174275A - Method for coating columnar body and coating roller therefor - Google Patents

Abstract

PURPOSE:To conveniently repair-coat the surface of a columnar body by moving a porous coating roller holding a first sand-coat paint on the body surface in its axial direction and then moving a porous coating roller holding a second sand-coat paint in the same way. CONSTITUTION:The first sand-coat paint with a synthetic-resin emulsion as a binder of the aggregate is held on the surface of the porous coating roller 1. The roller 1 holding the first sand-coat paint is moved on a columnar body P having a circular or elliptic cross section in the axial direction of the body P. The second sand-coat paint of a synthetic-resin emulsion with >=1 kind selected from natural sand, broken ceramic pieces or a precolored aggregate as a binder is held on the roller 1. The roller 1 holding the second sand-coat paint is moved on the body P in its axial direction. Consequently, the surface of an existing columnar body is conveniently repair-coated.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for coating a columnar body with a circular or elliptical cross section, and a coating roller used in the method. .

[Prior Art] In general, columnar bodies with circular or oval cross sections, such as utility pole railings, etc. (after installation, the surface may discolor due to environmental pollution, or steel pieces leaked from signboards etc. attached to the surface may discolor the columnar body). It adheres to the body surface and becomes unsightly.Therefore, it spoils the scenery of surrounding environments such as parks, green areas, and urbanized areas.

In order to avoid such problems, the surface of the columnar body is colored or patterned to match the surrounding environment.

For example, Japanese Unexamined Utility Model Publication No. 10052/1983, Japanese Unexamined Patent Publication No. 59/1983
Publication No. 106655 and Japanese Utility Model Application No. 137750/1987 (1987-137750) (techniques for forming a surface layer on the surface of concrete balls such as utility poles with colored cement in a color that matches the surrounding environment, and cement colored by mixing pigments) Techniques have been proposed for forming surface layers such as wood grain patterns.

Further, Japanese Patent Application Laid-Open No. 49-25746 proposes a technique (color paint) for coloring the surface of a columnar body by a coating method such as brush/roller coating or spraying.

Furthermore, the coating roller to be used is the Utility Model 59-3
Japanese Patent No. 1472 proposes a method in which a cylindrical paint tool (roller) for holding paint is formed on the outer periphery of a coil spring supported by a curved shaft.

[Problems to be Solved by the Invention] However, the above conventional technology has the following problems.

Color cement surface layer 1 The technology of forming a colored cement surface layer on the surface of utility poles, etc. is effective in providing new utility poles, etc. from the manufacturing process, but it is not possible to form the above surface layer on the surface of existing utility poles, etc. It is difficult. In other words, because it uses a large-scale mold, it cannot be installed on-site, and is not suitable for repairing rusty utility poles. In addition, the free lime released from the cement that formed the surface layer reacts with carbon dioxide gas in the air, causing a phenomenon in which calcium carbonate, which is hardly soluble in water, is produced on the surface of the painted columnar body, the so-called Nikka phenomenon. This will lead to surface deterioration.

On the other hand, when applying color paint to the surface of a columnar body, although it can be easily applied on-site, the color is monotonous and causes unevenness, and the curing and painting work itself may require time and effort. . For example, when spray painting, it is essential to cover the construction area with a sheet to prevent the spray paint from scattering around, and to arrange for a compressed air source (compressor).

In this respect, it is preferable to use the above-mentioned conventional painting roller because it reduces the need for curing, etc. However, since the curvature of the coil spring is regulated by the shaft that supports the freely curvable coil spring, the curvature follows the surface of the columnar body. It may be difficult to use it for painting columnar objects.

The present invention has been made in order to solve the above-mentioned problems.6 It is the first object of the present invention to simultaneously realize the simplification of repair painting of the surface of an existing columnar body and the maintenance of the surface condition of the columnar body after painting as it was at the time of painting. The second objective is to provide a coating roller that is easy to use.

Attention Configuration [Means for Solving the Problem] In order to achieve the first object, the procedure adopted in the first invention is as follows: Using a porous paint roller that holds paint on a porous painted surface. A method for coating a columnar body having a circular or elliptical cross section, wherein a first sand wall-like paint containing a synthetic resin emulsion as an aggregate binder is applied to the coating surface of the porous coating roller. and moving the porous coating roller holding the first sand wall-like paint onto the surface of the columnar body along the axial direction of the columnar body, applying natural sand, A second method using a synthetic resin emulsion as a binder for one or more selected from crushed porcelain granules or pre-colored aggregates.
The gist thereof is to move a porous coating roller holding a second sand wall-like paint onto the surface of the columnar body along the axial direction of the columnar body.

In addition, in order to achieve the above first object, the procedure adopted in the second invention is a method for coating a columnar body having a circular or elliptical cross section, the method comprising: applying a synthetic resin solution to the surface of the columnar body, holding the second sand wall-like paint according to claim 1 on a porous coating roller having a porous coating surface, and forming the second sand wall according to claim 1. The gist thereof is to move a porous coating roller holding a shaped paint onto the surface of the columnar body along the axial direction of the columnar body.

Further, in order to achieve the second object, the means adopted in the third invention includes: a roller member having a porous surface; and a shaft that rotatably supports the roller member and is fixed to a support member. A coating roller for use in the method for coating a columnar body according to claim 1 and/or claim 2, comprising: a supporting member, and a small roller having a porous layer on its surface. The gist thereof is that a plurality of small rollers are arranged in parallel in the direction of the rotation axis, and the shaft supporting member is constituted by a coil spring that rotatably supports each of the small rollers arranged in parallel.

[Operation] A first invention that adopts the above procedure (above) By moving a porous coating roller holding a first sand wall-like paint onto the surface of a columnar body along the axial direction of the columnar body, this first sand wall A paint is applied to the surface of the columnar body as an undercoat.In other words, the aggregate in the first sand wall paint is fixed on the surface of the columnar body (2) with a synthetic resin emulsion to form artificial irregularities. is the roller contact when applying the second sand wall-like paint with a porous coating roller.

Next, the second sand wall-like paint is applied by moving the porous coating roller holding the second sand wall-like paint along the axial direction of the column on the surface of the column where the roller hook has already been formed. It is applied on top of the first sand wall-like paint to serve as a top coat.

In this way, following the formation of irregularities on the surface of the columnar body, the natural sand, crushed porcelain, pre-colored aggregate, etc. in the second sand wall-like paint are mixed with the synthetic resin emulsion, which is the binder of the second sand wall-like paint. It sticks to the surface.

As a result, the surface of the columnar body has irregularities based on the degree of swelling of natural sand, etc. in the second sand wall-like paint and the degree of formation of irregularities, which corresponds to the unevenness caused by the aggregate in the first sand wall-like paint. Continuous undulations are formed.

In addition, the second invention provides a method for forming irregularities on the surface of the columnar body using aggregate instead of applying the first sand wall-like paint in the first invention. Undercoating is performed by applying to the surface, and the unevenness formed on the surface of the columnar body is used as a roller catch when the second sand wall-like paint is applied with a porous coating roller.

Then, similarly to the first invention, the second sand wall-like paint is applied to the surface of the columnar body on which roller hooks have already been formed using a porous coating roller, and the second sand wall-like paint is applied to the surface of the columnar body. Irregular undulations are continuously formed based on the degree of swelling of natural sand etc. in the paint and the degree of unevenness formed in the undercoat.

Furthermore, each of the above-mentioned sand wall-like paints containing aggregate etc. is held in the porous layer of each small roller of the third invention used in the above-mentioned first and second inventions (a plurality of small rollers are arranged in parallel). , when moving along the axial direction on the surface of the columnar body, the coil springs are curved to follow the surface shape of the columnar body while each ]J, \ roller is rotatably supported, and each small roller is moved along its axial direction. A sand wall-like paint with a porous layer pressed against the surface of the columnar body is applied.

[Example] Next, a first example of a method for coating a columnar body according to the present invention and a porous coating roller (hereinafter simply referred to as a coating roller) used therein will be described based on the drawings. Fig. 1 is an explanatory diagram for explaining the outline of the method of coating a columnar body using the coating roller of the first embodiment, Fig. 2 (A), (B)
) is an explanatory diagram for explaining the outline of the painted state of the surface of a telephone pole, Figure 3 is a partially cutaway plan view of the painting roller used, and Figure 4 is a schematic diagram of a part of the surface of a telephone pole after painting is completed. FIG.

As shown in FIG.
It is constructed by rotatably supporting two porous rollers 4.

Each porous roller 4 includes a sleeve 6 that is rotatable with respect to a coil spring 5 stretched between each hook 38 at the tip of the support frame 3, an outer ring 7 into which the sleeve 6 is fitted, and an outer ring 7 provided on the outer periphery of the outer ring 7. It is provided with a porous layer 8, and is configured to be rotatable around the coil spring 5 as an axis.

Further, in order to prevent each porous roller 4 from moving along the axial direction of the coil spring 5, a stop ring 9 fixed to the outer periphery of the end of the coil spring 5 restricts the movement of the porous rollers 4 at both ends toward the hook 3a. ing.

Next, a method of painting utility poles using the painting roller 1 will be described. The coating method of this example is as described below.
The process is completed by performing each process in sequence: base preparation process, base coating process, undercoating process, topcoating process, and protective layer forming process.

The substrate preparation process uses a scraper and a wire brush.

Using sand vapor, rags, etc., rub the surface of the utility pole P to remove adhering dust, dirty steel pieces, etc. After that, the surface is dried and adjusted to a clean surface.

Base coating process (As the base coating agent, select an epoxy modified resin solution (solvent type - liquid clear type), acrylic solution, vinyl acetate solution, vinyl chloride solution, epoxy solution, urethane solution, etc.) as appropriate. This solution is applied to the prepared surface of the utility pole 2 using a brush roller or the like to strengthen the surface, which has become brittle due to exposure to the outside air, and the applied resin solution repairs any scratches. At this time, the amount of resin solution applied is 0.15 to 0.19 kg/r.
It is preferable that the range of r However, the direction of movement of the brush roller, etc. does not matter.

In the undercoating process, the following first sand wall paint is used.

The first sand wall-like paint in the undercoating process (acrylate monomer such as acrylic acid ester or methacrylic acid ester) is added to 4'L of polymerizable organic acids such as acrylic acid, emulsification level, polymerization initiation level, pH adjuster, etc. In addition, an aqueous emulsion of an acrylic resin prepared by emulsion polymerization in an aqueous medium is used as a binder.

Furthermore, the total solid content is 70% or more, and 15% of the total solid content is
This is a sand wall-like paint that is adjusted to have an aggregate content of ~30% by weight of natural sand with a size of 0.1 to 0.5 mm and a porcelain finish coating material.

In this undercoating step, as shown in FIG. 1, the coating roller 1 holding the first sand wall-like paint in the porous layer 8 of each porous roller 4 is moved over the surface of the telephone pole P as indicated by the arrow in the figure. Move along the axial direction shown. At this time, paint roller 1
As shown in FIG. 3, the coil spring 5 is bent to follow the surface of the utility pole P, and the first sand wall-like paint retained in the porous layer 8 is applied to the surface of the utility pole P.

In this way, in the undercoating process, the utility pole P is undercoated with the first sand wall-like paint, and as shown in FIG. This creates a roller hook for the next process. Furthermore, the moving direction of the coating roller 1 is as follows:
From the viewpoint of appearance after painting, it is preferable to raise or lower in one direction along the axis of the utility pole P, and the application amount of the first sand wall-like paint is 1i 0. A range of 4 to 0.8 kg/n is preferable from the viewpoint of appearance and consumption reduction. Also, it is preferable that at least one hour has elapsed since the start of the undercoating process.

The following second sand wall paint is used in the top coating process that follows the undercoating process.

The second sand wall-like paint in the top coating process has a coating thickness of 0.05 to 3.
This is a milky-white sand wall paint that uses the aqueous emulsion of acrylic resin prepared in the above-mentioned No. 2 @ wall paint as a binder for natural sand of 0 mm size, crushed porcelain granules, pre-colored aggregate, etc. The aggregate and the like are adjusted to account for 70 to 90% by weight of the total solid content.

In this top coating step, as in the undercoating step, as shown in FIG. The second sand wall-like paint is applied to the surface of the utility pole P by moving it along the axial direction indicated by the arrow in the figure on the surface of the utility pole P while curving it.

In this way, the surface of the utility pole P, on which roller hooks have already been formed, is coated with the second sand wall-like paint, as shown in Figure 2 (8).
), around the unevenness caused by 1 in the aggregate in the first @ wall-shaped paint fixed on the surface of the utility pole P, 2 in the aggregate such as natural sand in the second sand wall-shaped paint is applied to the second sand wall. It is bound by emulsion E2 which forms a paint.

When applying the second sand wall-like paint, it is preferable for the paint roller 1 to move in one of the upward and downward directions along the axis of the telephone pole P, from the viewpoint of appearance, and the applied amount is as follows: 1. A range of 0 to 3.0 kg/- is preferable from the viewpoint of design, such as giving a sense of weight and appearance and beauty. In addition, it is preferable that at least 3 hours have elapsed since the start of the topcoating process (completion of the undercoating process), as this will strengthen the adhesion of the aggregate during the application of the first sand wall paint.

As a result, the surface of the utility pole 9 has milky-white irregular undulations consisting of bulges of aggregate 1 in the first wall paint and 2 mounds of aggregate such as natural sand in the second sand wall paint. As shown in FIG. 4, which schematically shows a part of the surface, a granite-like pattern is formed on the surface of the utility pole P after the completion of the topcoating step of the continuously formed tags.

After 24 hours or more have passed after the completion of the above-mentioned top coating step, the protective layer forming step is carried out. This protective layer forming process consists of urethane resin solution, acrylic resin solution, silicone resin solution;
A resin solution such as the acrylic modified fluorinated resin solution 5 is applied once or twice to the surface of the utility pole 9 after the top coating process using a brush or a roller. As a result, a resin protective layer that protects from the outside air is formed on the surface of the utility pole P to which the first and second wall paints have been applied.

At this time, the amount of resin solution applied was 0. 2~0.3kg/
rr? This range is preferable from the viewpoint of reducing consumption, and the direction of movement of the brush roller, etc. during application does not matter.

If the painting method of the first embodiment described above is implemented, the surface of the existing utility pole P can be easily repaired in a short period of time without special curing such as temporary sheeting to prevent paint scattering, arranging a compressor, etc. Not only can it be carried out on-site, but the surface condition after painting can be maintained for a long period of time by avoiding the occurrence of efflorescence.

In addition, by using comb-shaped stone-like utility poles, it is possible to improve the appearance and aesthetics, and also to adapt to the landscape of the surrounding environment.Moreover, it is possible to reduce the amount of organic solvent used and improve the working environment based on this reduction. It is also possible to improve In addition, since a resin protective layer is formed, the painted surface is prevented from being corroded by the outside air.

Furthermore, according to the above-mentioned painting roller, the coil spring 5 itself that supports the roller at its center is curved to follow the surface of the utility pole, which increases the adhesion between the outer periphery of the roller and the surface of the utility pole, thereby preventing paint from being applied to the columnar body. It is possible to improve both coating efficiency and usability.

Next, a second embodiment will be briefly described.

In this second embodiment, the base coating process (application of epoxy modified resin solution to the surface of the utility pole 9) and the undercoating process (second @ application of wall paint) in the first embodiment are replaced with the following. In this example, the initial coating step of 5 is carried out, and the initial coating step of base preparation 5, top coating step, and protective layer forming step similar to those of the first embodiment are sequentially performed.

The initial coating process ranges from 0.1 to 0. A paint using an epoxy-modified resin solution as a binder with a solid content (70 to 90% by weight) consisting of natural sand of 5rrrn size, crushed porcelain granules, pre-colored aggregate, etc. and white pigment is used. The paint is applied to the surface of the utility pole 2 after the substrate has been prepared using a brush, roller, etc. As a result, the surface of the utility pole 2 is strengthened with resin, the scratches are repaired, and the surface of the utility pole 2 is formed with a roller for the next process by forming unevenness on the surface.

At this time, the amount of resin solution applied is 0.4 to 1.2 kg/r.
The range d is preferable from the viewpoint of surface reinforcement, scratch repair, etc., and it is also preferable to start the process after the surface of the utility pole P is sufficiently dried after the substrate preparation process is completed.

Furthermore, when applying, the direction of movement of the brush roller, etc. does not matter.

After the above initial coating process is completed, similarly to the first embodiment, a top coating process (applying the second sand wall-like paint to the utility pole P by the coating roller 1), a protective layer forming process (coating the utility pole P with a resin solution such as a urethane resin solution), (coating).

Therefore, if the coating method of this second embodiment is implemented, the first
Similar to the embodiment, the surface of the existing utility pole P has a granite-like pattern with continuous milky white irregular undulations, and the surface repair of the existing utility pole P is simplified and shortened, and It is possible to maintain the surface condition for a long period of time after painting.

Further, compared to the first embodiment, it is possible to omit a process step, so that the construction period and cost can be further reduced.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments in any way, and it goes without saying that the present invention can be implemented in various forms without departing from the spirit thereof.

For example, by suitably blending various coloring pigments into each of the above-mentioned paints, it is possible to hide the color of the base of the utility pole and to adapt it to the landscape of the surrounding environment.

As described above in detail including the examples, according to the coating method for columnar bodies of the present invention, the surface of existing columnar bodies such as utility poles and handrails can be repaired without special curing. Not only can it be carried out easily and on-site within a short period of time, but
It is possible to avoid efflorescence and maintain the surface condition after painting for a long period of time.

As a result, it is possible to achieve design effects such as saving space in the work area, reducing construction costs, and improving appearance and aesthetics.

Further, according to the porous coating roller of the present invention, since the coil spring itself that supports the roller at its center is freely curved to follow the surface of the columnar body, there is no restriction on the diameter of the columnar body to be coated. By increasing the adhesion between the outer periphery of the roller and the surface of the columnar body, it is possible to improve both the efficiency of applying paint to the columnar body and the ease of use thereof.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram for explaining the outline of the coating method for a columnar body using the coating roller of the first embodiment; FIG. 2(A);
(B) is an explanatory drawing for explaining the outline of the painted state of the surface of the utility pole, Figure 3 is a partially cutaway plan view of the painting roller used, and Figure 4 is a part of the surface of the utility pole after painting is completed. FIG. 1... Porous coating roller 3... Support frame 4... Porous roller 5... Coil spring P... Telephone pole

Claims (1)

[Scope of Claims] 1. A method for coating a columnar body in which the surface of a columnar body having a circular or elliptical cross section is coated using a porous coating roller holding a paint on a porous coating surface, the method comprising: A first sand wall-like paint having a synthetic resin emulsion as an aggregate binder is held on the painted surface of the porous coating roller, and a porous paint roller holding the first sand wall-like paint is placed on the surface of the columnar body. moving along the axial direction of the columnar body and applying a synthetic resin emulsion as a binder of one or more selected from natural sand, porcelain granules or pre-colored aggregate to the coating surface of the porous coating roller; 2
A method for coating a columnar body, the method comprising: moving a porous coating roller holding a second sand wall-like paint onto the surface of the columnar body along the axial direction of the columnar body. . 2. A coating method for a columnar body in which the surface of a columnar body with a circular or elliptical cross section is coated, wherein a synthetic resin solution containing aggregate is applied to the surface of the columnar body to form a porous painted surface. A porous coating roller holds the second sand wall-like paint according to claim 1, and the porous coating roller holding the second sand wall-like paint according to claim 1 is placed on the surface of the columnar body along the axis of the columnar body. A method for painting a columnar body characterized by moving along a direction. 3. The columnar body according to claim 1 and/or claim 2, comprising: a roller member having a porous surface; and a shaft support member rotatably supporting the roller member and fixed to a support member. A painting roller used in a painting method, wherein the roller member is formed by arranging a plurality of small rollers having a porous layer on the surface in parallel in the direction of the rotation axis, and the shaft supporting member is A porous coating roller comprising a coil spring that rotatably supports each of the small rollers in the installed state.